7/3 Frago

Bill says: The reason this doesn't happen more often is that even a "high-speed" demonstration pass is normally flown around 500 knots - which looks plenty fast to the average public audience, but is only about Mach 0.75 (the speed of sound at sea level is around 660 knots) so the chances of an inadvertent Mach bust are small. Fortunately, nobody was standing under the front of the building.

The pioneer years of aviation included both successful and misguided efforts to make the number of safe landings approximate to the number of takeoffs. Here are some notable examples on both sides of that record.